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Problem 28.53 A proton is fired from far away toward the nucleus of a mercury atom. Mercury is element number 80, and the diameter of the nucleus is 14.0 fm. Part A If the proton is fired at a speed of 3.2x107 m/s, what is its closest approach to the surface of the nucleus? Assume the nucleus remains at rest. Express your answer to two significant figures and include the appropriate units. fim 8.5 Submit My Answers Give U Incorrect, Try Again; 3 attempts remaining

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